GSC  Vol.4 No.3 , August 2014
Photoelectrocatalytic Oxidation of Ethinylestradiol on a Ti/TiO2 Electrode: Degradation Efficiency and Search for By-Products
ABSTRACT
The degradation of ethinylestradiol (EE, an orally bio-active estrogen) in an aqueous-methanolic solution using a Ti/TiO2 thin-film electrode and UV radiation (a photoelectrocatalytic system) was evaluated. Hence, HPLC/UV analysis shows that EE (at 0.34 mmol) is totally consumed after 30 minutes of exposure to the photoelectrocatalytic system in the presence of Na2SO4 (0.1 mol·L-1) and with an applied bias potential of +1.0 V versus the Ag/AgCl reference electrode. Moreover, monitoring by direct infusion electrospray ionization mass spectrometry (ESI-MS) and SPME-GC/ MS (solid phase microextraction coupled with gas chromatography-mass spectrometry) reveals that apparently no degradation products are formed under these conditions. Hence, this study demonstrates that the photoelectrocatalytic system can be efficiently used to promote the complete degradation (and likely mineralization) of this hormone under these conditions.

Cite this paper
Moreira Vieira, K. , Maria Monteiro Paschoal, F. , Valnice Boldrin Zanoni, M. , Cristina Nascentes, C. and Augusti, R. (2014) Photoelectrocatalytic Oxidation of Ethinylestradiol on a Ti/TiO2 Electrode: Degradation Efficiency and Search for By-Products. Green and Sustainable Chemistry, 4, 151-161. doi: 10.4236/gsc.2014.43020.
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